Maybe its because i dont seem to express my opinions all that well or just lack eloquence, but doing so for me usually just results in exchanging tldr replies and whatever i try to communicate gets twisted because other poster sees discussing as a "competition" or sees me as someone to be "proven wrong", end result being no real discussion made.
It ends up being rather drainning so for the most part i avoid emitting unpopular opinions or replying to people who have a radically different viewpoint to mine since in my experience, there is little point talking, "shup up and move along" just saves a lot of hassle. More power to the people willing to wade into long discussions though, its those kind of people that tend to make a thread interesting

Not to mention those brave souls who take up unpopular stances and end up having to stand their ground against a ton of other posters.
OT: As explained its fairly easy to shut down my interest in a conversation. Be snide or passive agressive and i should leave soon enough, ive never been really good at arguing and been comprensively out argued even when i was right on a topic xP